Blue arrow Questions

Hello

i've looked all over the web and the manual but can't seem to find the answer. I have an Oregon 450 and on the map/location page there is a blue arrow indicating my position. Where is my position exactly in relation to the arrow. Is it the tip of the arrow, the darker arrow inside the blue arrow, or just the whole arrow. I'm using it to mark property boundaries along with my compass so it is fairly important. When you zoom in on a topo/property map the whole of the arrow may take up 50 or more representative feet on the screen. The difference between the tip and the back end could be a lot of ground?

Any help would be appreciated.